Bolster for railway-cars.



N0. 830,519. PATENTBD SEPT. 11, 1906. J. 0. NBIKIRK. BOLSTER POR RAILWAY GAR-S.

APPLICATION FILED JUNE 190s.

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QQ m@ n@ t/OH 05m?" ses Y `aci tizenof the: United States, residing yat .UNITED STATES PATENT JOHN OSCAR NEIKIRK, OFCHICAGO, ILLINOIS.

i Nays-30,519.

To all whom it may eezecewt: 4

`Be it known that I, JoiN OscAn N EIKIRK, Chicago, in the county'ofCook and Stateof Illinois, have invented certain new and usef'ul Improvements in Bolsters for ,Railway- Cars, of which the following is a specification.

My invention relates' to railway-car boli sters, and has for itsobject to :provide a bolster having the required-strength and minimum weight and a bolster which can be made from iron of commercial shapes.

To this end my invention consists in the combinations and details hereinafter described and claimed.

In the accompanying drawings, Figure l is a front elevation of my improved bolster, showing both the truck and body-bolster. Fig. 2 is a top plan view of the truck-bolster. Fig. 3 is a transverse section on the line 3 of Fig. 1. Fig. 4 is a top plan view of one end of the truck-bolster. Fig. 5 is a transverse section on the line 5 of Figli.

In practicing my invention I form a bodybolster of the usual top or compression member and bottom or tension member, these compression and tension members being each formed from pairs of angle-bars, each pair of bars having vertical flanges lying adjacent each other and oppositely-extending horizontal flanges, said horizontal flanges forming the top and bottom members of the bolster.

The letters a a. indicate the oppositelyextending horizontal flanges of the pairs of angle-bars forming a bottom or tension member, and the letters a2 a3 the upwardly-extending vertical flanges of the bottom or tension member. The top or compression member has similar opp'ositely-extending horizontal flanges bt and vertical flanges b2 b3, and it will be observed that the vertical flanges of the top or compression member extend downwardly and the vertical flanges of the bottom or tension member extend upwardly. The compression and tension members are rigidly secured together at their ends by l* Specification of Letters Patent, Application ned June 8,1906. serial no. 320.804.

suitable rivets t. By referring to Fig. 5 it will be observed vthat each pair of angle-bars forming the tension member is separated, so as to receive between them the downwardlyextending vertical flanges of the compression member, the rivets Z passing through and serving to secure all the flanges together.

The compression and tension members are l BOLSTER 4FOF? RAI LWYCARS- Patented sept. v'11,' i906.

orrion.-

bent upwardly and i downwardly, respectively, so as to be spaced apart atzthe middle of the bolster and they are held spaced apart by an angle-iron strut member ofthe general .shape of an inverted letter U.4 Thisstrut .member is composed also ofpairs of anglebars having vertical flanges and oppositelyextending horizontal flanges: The vertical flanges of the strut member at its apex or upper point are received between the downwardly-extending vertical flanges of the compression member, which are separated to receive the flanges ofthe strut. At each end the flanges of the members of the strut are separated, so as to receive the upwardly-extending vertical flanges of the tension member. In the drawings the reference-letters c c represent the oppositelyextending flanges of the strut, and the letters c2 c3 represent the flanges at right angles to the oppositely-extending flanges c c. Rivets d and e serve to firmly secure the strut to the compression and tension members, respectively. Suitable cover-plates g at the ends of the bolster 7c and at the middle point thereof serve to secure the members of the compression member together. and 2.)

There are many advantages arising from the use of angle-bars in building up a bolster. By using material of this form I not only am enabled to use an ordinary commercial shape, but at the same time secure additional strength where the parts are rigidly held together by rivets on account of the extended bearing for the rivets, which necessarily pass through four of the flanges. I am also enabled by building the compression and tension members of pairs of angle-bars to firmly secure the parts together, in the manner described, by separating the flanges of one or (Clearly shown in Figs. l

the other of the members, so as to receive the flanges of the opposite member between them. So, also, by using the angle-iron strut I am enabled to very rigidly and securely fasten the same to the members of the bolster.

f indicates the body-bolster, formed in the usual manner, as a built-up girder of a boxsection consisting of angles f f2, having downwardly-extending vertical angles f3 f4, having upwardl -extending flanges riveted together, with a cover-platef5 forming the top of the bolster.

It will be observed that my bolster is of flanges, and

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very simple construction, but at the same time has a maximum amount of strength with the minimum quantity oi material.

I claim- 1. A bolster for railway-cars having compression and tension members composed of v angle-iron bars .arranged in pairs, said compression and tension members being rigidly secured together at theirends, and a strut separating the compression and tension members and secured thereto.

2. A bolster for railway-cars having compression and tension members composed of angle-iron bars arranged in pairs, said compression and tension members being rigidly secured together at their ends, and an angleiron strut separating the compression and tension members.

3. A bolster for railway-ears having compression and tension members, said tension members being composed of angle-irons having upwardly-extending vertical flanges and said compression members being composed of angle-irons having downwardly-extending vertical ilanges, and a strut separating the tension and compression members, said strut composed of angle-iron members having adjacent flanges received between thevertical flanges of the compression member, and said strut being separatedat its ends and receiving the vertical flanges of the tension member between its separated arts.

JOHN OSC R YEIKIRKq Witnesses:

NORMAN A. STREET, v W. T. JONES. 

